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| n | a(n) |
|---|---|
| 0 | 4 |
| 1 | 49 |
| 2 | 144 |
| 3 | 9 |
| 4 | 324 |
| 5 | 42849 |
| 6 | 46656 |
| 7 | 1347921 |
| 8 | 3175524 |
| 9 | 1896129 |
| 10 | 23619600 |
| 11 | 532917225 |
| 12 | 359254116 |
| 13 | 30866624721 |
| 14 | 59997563136 |
| 15 | 185622243921 |
| 16 | 917583904836 |
| 17 | 4659420127761 |
| 18 | 750046066704 |
| 19 | 604376350260489 |
| 20 | 964709560931076 |
[4,49,144,9,324,42849,46656,1347921,3175524, 1896129,23619600,532917225,359254116,30866624721, 59997563136,185622243921,917583904836, 4659420127761,750046066704,604376350260489, 964709560931076] |